﻿#include <iostream>

class Date
{
public:
    Date(int year = 1, int month = 1, int day = 1)
    {
        _year = year;
        _month = month;
        _day = day;
    }

    bool operator<(Date& d)
    {
        
    }
private:
    int _year;
    int _month;
    int _day;
};

int main()
{
    
}
